98 Corvette Trans tune following gear swap

[MPlesha]

Hi,

Quick question....have a 98 Vette that had a 2:73 rear end...swapped that out for a 3:42 diff.

I have attached my tune file, and was wondering what needs to be tweaked to get it shift correctly.

Tires in the rear are 26.3" tall....but I'm not sure of the formula, or what exactly needs to be changed here.

Thanks for the help and stay safe!